﻿// Licensed to Monkey Square, Inc. under one or more contributor 
// license agreements.  See the NOTICE file distributed with 
// this work or additional information regarding copyright 
// ownership.  Monkey Square, Inc. licenses this file to you 
// under the Apache License, Version 2.0 (the "License"); you 
// may not use this file except in compliance with the License.
// You may obtain a copy of the License at 
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

using System;
using System.Threading.Tasks;
using AcceptDelegate = System.Action<System.Collections.Generic.IDictionary<string, object>, System.Func<System.Collections.Generic.IDictionary<string, object>, System.Threading.Tasks.Task>>;

namespace Owin.Types
{
    public partial struct OwinRequest
    {
        public bool CanAccept
        {
            get { return AcceptDelegate != null; }
        }

        public AcceptDelegate AcceptDelegate
        {
            get { return Get<AcceptDelegate>(OwinConstants.WebSocket.Accept); }
        }

        public void Accept(
            OwinWebSocketParameters parameters,
            Func<OwinWebSocket, Task> callback)
        {
            var accept = AcceptDelegate;
            if (accept == null)
            {
                throw new NotSupportedException(OwinConstants.WebSocket.Accept);
            }
            accept.Invoke(
                parameters.Dictionary,
                webSocket => callback(new OwinWebSocket(webSocket)));
        }

        public void Accept(
            string subProtocol,
            Func<OwinWebSocket, Task> callback)
        {
            Accept(OwinWebSocketParameters.Create(subProtocol), callback);
        }

        public void Accept(
            Func<OwinWebSocket, Task> callback)
        {
            Accept(OwinWebSocketParameters.Create(), callback);
        }
    }
}
